Perpetual calendar.



J. E. HILL.- PERPETUAL CALENDAR. PPLIOATION FILED JAN. 1o, 1911.

Patented Nov. 3, 1914.

THS NORRIS PTERS CQ.. PHOTUYLITH l. wASHlNuroN. DA C.

JOHN E. HILL, 0F BOSTON, MASSACHUSETTS.

c ERPETUAL CALENDAR.

Specification of Letters Patent.

Patented Nov. 3,y 1914.

Application filed January 10, 1911. Serial No. 601,909.

To all whom t may concern Be it known that I, JOHN E. I-IILL, a eitizenof the United States, residing at Boston, county of Suimiolk, State ofMassachusetts, have invented an Improvement in Perpetual Calendars, of'which the following description, in connection with the accompanyingdrawing, is a speciication, like characters on the drawing representinglike parts.

This invention has for its object to provide a no-vel perpetual calendarwhich is very simple in its construction and which can be easilymanipulated to set it for any month in any year.v y

The features wherein the invention resides Will first be described andthen the novel features will be pointed out in the appended claim. c

Referring to the drawings, Figure 1 is a front vieiv of a calendarembodying my invention; Fig. 2 is a section on the line :za-a2, Fig. 1.

The calendar comprises a main body or backing 3 which may be ofcardboard, sheet metal, or any suitable sheet material. This body 3 isprovided With an aperture l through which some portion of a movablemonth-indicating member 5 can be seen. This month-indicating member isin the form of a strip of paper, cardboard or similar material, whichlies against the back side of the backing 3 and passes under a guide orloop 6 secured to the backing, said guide preferably being situateddirectly in line With the opening 4 so that the portion ot' the strip 5which is visible through the opening Will be held closely against thebacking. This strip 5 has imprinted on its face the months of the year,as shown in Fig. 1, and by moving it up and down, the imprintdesignating any month niay be brought into line with the aperture t sothat it Will be visible therethrough. As shown in the drawings thebacking member 5 is set to display the Word January Pivotally mounted onthe front of the backing member 3 is a disk 7 having imprinted thereonthe days of the Week. Said disk is pivoted centrally to the backingmember and may be secured thereto in any suitable Way, as by means of arivet 8. The disk has imprinted on its face the days of tive full Weeks,that is, thirty-five successive days are displayed on the disk, asClearly seen in Fig.- 1.

Pivotally mounted on the pin 8 is a pointer or indexmember 9 Which canbe moved 'around said pin as a center, said pointer overlying the fronttace ot the disk 7 and lying thereagainst. The backing 3 has imprintedthereon directly outside of the disk 7 and adjacent the peripherythere-` ot the numbers from onel to thirty-one, as shown at 10, andthese numbers are so spaced that one number Will come opposite each ofthe days marked on thedisk 7. The pointer 9 is long enough to extendbeyond the disk 7 and point to or overlie the num` bers 10. The disk 7can be turnedl through a limited arc to permit it to be set fordifferent months, and as herein shown said disk is provided With athumb-piece 11 which is secured to the back side thereof and whichextend through a segmental slot l2 formed in the backing member, saidthumb-piece being bent back on itself, as at 13, to frietionally restagainst the back side of the backing. 3. r'The kthumb-piece 11 Will bepreferably resilient, and the portion 13 thereotvvill bear against thebacking 3 With suliicient pressure so that said `member Will actfrictionally to hold the disk in any adjusted position.

It vvill be understood, kof course, that they pointer 9 mustbe adjusted`torwardjone step on each day of the month tvhile the disk 7.

and the strip 5 need to be adjusted only at the beginning of each month.If, for in-` stance, the calendar is to be set to indicate January 1,1911, which comes in on Sunday, the strip 5 Will be adjusted to exposethe Word January through'the opening 4,

as shown in the drawings. The disk 7 is then adjusted so as to bring thedesignation Sun. opposite the figure 1 which will position the disk 7correctly relative tol the numbers 10 sothat by comparing the designation for any day on the disk 7 with the number standing opposite it,it can ybe readily observed on What day of the month any day of the Weekoccurs, and on What day of the Week any day of the month ooours. Thepointerv 9 Will then be set to point to l as shown in the drawing, andthe calendar will read Sun. January l. On the next `day the pointer 9Will be advanced to indicate the ligure 2 for Mon. January 2, and so onthrough the days of the month. It Will be observed that J anuary runsout on a Tuesday, and consequently February comes in on a Vednesday.Therefore, at the end of the month it is necessary to shift the disk 7backwardly sufficiently to bring the designation IN/ved. opposite theligure l and then to advance the pointer 9 to said figure 1. Atthe sametime the strip 5 must be adjusted to expose the Word February Februaryruns out on av riuesday, and March comes in on a lVednesday, so that thedisk 7 will require no Jfurther adjustment tor March. March runs out ona Friday, so that in order to adjust the disk 7 for April Will requiresetting it so that the designation Sat will come opposite the figure lOne of the advantages of the calendar lies in the fact thatthe disk 7has live full Weeks imprinted thereon, and there are, therefore, fourdays which stand opposite the gap betvveen the numbers 3l and l. By thisar rangement, the disk 7 may be adjusted for any month with lessconfusion than it i: had only 31 designations thereon.

Having fully described my invention what I claim as new and desire tosecure by Letters Patent is In a perpetual calendar, the combinationwith a backing having a sight opening, of a movable member behind thebacking bearing the months of the year and adapted to be moved to exposeany month through the sight opening, a disk pivoted to the front of thebacking and bearing the days for ve full Weeks, a pointer pivotallymounted concentrically of the disk and overlying the latter, saidbacking having the days of the month printed thereon adjacent theperiphery of the disk, said numbers having the same spacing angularly asthe designations on the disk, said backing having a segmental slot in aportion that is covered by the disk, and a thumb-piece rigidly securedto the disk, extending through the slot and overlying and frictionallybearing against the back face of the backing, said thumb-piesconstituting a means for adjusting the' disks and frictionally holdingthe same in adjust ed position.

In testimony whereof, I have signed my name to this speciiication, inthe presence of two subscribing Witnesses.

` J OI-IN E. HILL. Wvitnesses LOUIS C. SMITH, THOMAS J. DRUMMOND.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Yatents.

Washington, D. C.

